Pneumatic tooth burr and drill



UNITED 4STATES PATENT OFFICE- GEORGE E. GREEN, '0E KALAMAZoo, MICHIGAN.

PNEUMATIC TOOTH BURR AND DRILL'.

Specification forming part of Letters Patent No. 77,370, dated April 28, 1868.

To all whom it may concern:

Be it known that I, GEORGE F. GREEN, of

. Kalamazoo, in the county of Kalamazoo and State ot' Michigan, have inventeda new and useful Pneumatic Tooth Burr and Drill; and I do hereby declare that the following is a ful, clear, and exact description thereof, rel"- erence being had tothe accompanying draw` ings, making part ot' this specification.

Figure l is side elevation; Fig. 2, burr', Fig. 3, burr or drill holder; Fig. 4, section drawing` of engine 5 Fig. 5, rotating piston to engine; Fig. 6, case to drill and burr holder; Fig. 7, drill.

rlhe nature otl my invention consists, sub-- stantially, in the employment ot' an engine which is operated by means of compressed air in connection with a burr or drill,.which is secured to one side ot' the engine in such a manner as to receive a continuous rotary inotion, which may be regulated at the will ol4 the operator.

The invention has for its object rapidity ol motion, slow or fast, as may be desired by the operator, to he used to dress and trim the surface ol" f'oil that has been forced into the cavi` ties of decayed teeth; also, to drill teeth and dress ont cavities ol' the same, and also to drill pla-te or any material, as may be desired.

To enable others skilled in the art to under stand my'invention, I will describe its construction and operation. Fig. 1 represents a case containing' a rotary engine at one end and a burr or drill at the other', also shows the place where the air enters the engine. Fig. 2 shows the burr with a screw cut on the opposite end, by means ot' which it is adjusted to the holder. Fig. 3' shows burr or drill holder with slot at the lower end, so arranged as to make a exible v joint at its connection with the engine, to prevent any strain Ion the piston-heads. Fig. 4 shows the passage ot' the air through the engine, as indicated by the arrows. Fig. 5 is a perspective view of rotating piston; Fig. 6, section drawing ot' case to drill-holder; Fig. 7, drill.

The whole is operated by means ot' a rub What l do claim as new, and desire to secure by Letters Patent, is-

1. The combination ot' a rotary engine operated by means ot' compressed air with a burr and drill, in the manner and for the purposes set forth and described.

2. Thermode ot' attaching the bur-r or drill to the holder, in combinationl with an engine, as set forth and described, iu the manner and. for the purpose specified.

3. The mode ot' attaching the burr or drill to the shaft ot' thecngine, in thel manner and for the purpose specilierh 4. The combination ot' burrs or drills, rotating in one direction, with an engine, as set forth and described, in the manner and for the purpose specified.

Y GEORGE F. GREEN.

Witnesses: i

J. H. BosTWIcK, RF. JUDsoN. 

